Lathe cooling liquid waste liquid filtering device

The utility model discloses a lathe cooling liquid waste liquid filtering device, and relates to the technical field of lathe cooling liquid recycling, the lathe cooling liquid waste liquid filtering device comprises a bottom plate, a mounting frame is fixedly welded to one side of the top wall of the bottom plate, a third cylinder is fixed to the top wall of the mounting frame, and the bottom output end of the third cylinder penetrates through the top wall of the mounting frame and is fixedly provided with a vertical plate; magnetic plates are fixedly embedded in the two side walls of the vertical plate, a supporting vertical rod is fixed to the other end of the top wall of the bottom plate, a filter box is rotationally connected to the top wall of the supporting vertical rod through a hinge shaft, and a filter screen is fixed to the lower end of an inner cavity of the filter box. A third air cylinder is started to extend to drive a vertical plate and a magnetic plate to synchronously move downwards, the ver